Automatic screw-tender.



No. 832,578. PATENTED OCT. 2, 19-06.

- L. W. HUNTINGTON.

AUTOMATIC SCREW TENDER. APPLICIATION rnznn 0on1, 1905.

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L. W. HUNTINGTON. AUTOMATIC SCREW TENDER.

APPLICATION FILED OOT.'31. 1905.

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' Altarize zs W/T/VES UNITED STATES PATENT OFFICE.

LUTHER W. HUNTINGTON, OF OASTLEROOK, WASHINGTON, ASSIGNOR OF ONE-HALF TOGEORGE W. ROWAN, OF OASTLEROOK, WASHINGTON.

Specification of Letters Patent.

Patented Oct. 2, 1906.

Application filed October 31 1905. Serial No. 285,348,

To all whom, it may concern Be it known that I, LUTHER W. HUNTING- TON,a citizen of the United States, residing at Oastlerock, in the county ofCowlitz, State of Washington, have invented a new and useful attachmentto an ordinary sawmill for the purpose of setting the screws in theheadblock upon which the saw-log rests while being cut into lumber; andI do hereby declare that the following is a full, clear, and exactdescription of my invention, which will enable others skilled in the artto which it appertains to make and use the same.

Hitherto the log to be out into lumber while resting on the head-blockwas forced to slide on the head block by the standard against which thelog rested, being forced against the log by means of a man turning acrank wheel or operating a lever attached to the end of the large screwwhich passes through the lower and concealed end of the standard.

The object of my invention is to enable the sawyer to be able to set thescrews to advance or offset the log, and this is done by afriction-wheel traveling on a vertically-movable track raised as thecarriage is moved forward toward the saw. I attain this object by themechanism illustrated in the accompanying drawings, in which Figure 1 isa perspective view of the invention. Fig. 2 is an end view thereof.

In the drawings, 20 indicates the carriage in an ordinary sawmill, orsufficient thereof to show the application of the invention. Mountedupon this carriage is a head-block 19, in which the knee 18 slides andis forced forward in a well-known way by a large setscrew 17*, containedin a tubular casing 17, set lengthwise in the head block. This screw maybe operated by a lever 16, which, however, is shown only to illustratethe old way of setting the screw.

1 represents a track conveniently made of a wooden plank or bar setbeside and parallel to the line of movement of the carriage 20, and 2indicates a friction-wheel mounted upon the end of the screw 17 a andadapted to contact with and be rotated by said track when it is raised.Said track is mounted or supported upon the sill or joist 1 by means ofswinging links 6 at the side edges thereof, and by power properlyapplied the links swing to raise or lower the track v1.

One of the links has an arm 6*, forming a bell-crank lever, which isconnected by a pin and slot at 10 to one arm of a lever 31 and extendscrosswise under the floor, beingfulcrumed at 12 on a bracket 5, whichmay be conveniently attached to the under side of the mill floor. Theother arm of the lever is connected to an upright rod 4, extending andworking through a hole in the floor and provided with a treadle 7, thesaid treadle being located in convenient position for the sawyer as hestands at the lever controlling the movement of the carriage. It will beseen that by depressing the treadle the lever operates the bell-crankand causes the track 1 to lift into contact with the wheel 2. Said wheelis graduated around its periphery to form a scale related to the pitchof the screw and to indicate the distance the knee 18 is advanced bymeans of an indicator 8, supported by a bracket on the head-block.

In operation the sawyer by pressing on the treadle as the carriageadvances toward the saw throws the track 1 in contact with the wheel 2and by watching the indicator is able to see how far said wheel travels,and consequently how far the standard and log are advanced, and onreaching the position to produce a board of the thickness desired thetreadle is released, allowing the track 1 to drop.

Only one head-block on the carriage is shown; but obviously more will beemployed and provided with similar devices to cooperate with the movabletrack 1, which may be made any lengthnecessary.

I claim 1. In a sawmill set-works, the combination with a carriage, asetting-screw thereon, and a knee operated by said screw, of africtionwheel on the rear end of the screw, a vertically-movable trackover which the wheel moves, and means to raise or lower the track intoor out of contact with the wheel, comprising swinging links on which thetrack is supported, and an operating-lever connected to one of saidlinks.

2. In sawmill set-works, the combination with a carriage, asetting-screw thereon having a friction-wheel on the outer end thereof,said wheel being provided with a scale around the same, a knee on thecarriage, operated b y 5 said screw, and an indicator on the carriagefor said scale, of a vertically-movable track over which the wheelmoves, and means to l raise or lower the track into or out of contactwith the wheel.

LUTHER W. HUNTINGTON.

Witnesses:

LEON MOSHER, GEO. B. ROWAN.

